Air temperature under load

This is the temperature of the air inside a tunnel, trough or channel. The same approach is used for air-filled pipes with ducts.

Symbol
$\theta_{at}$
Unit
°C
Formulae
$iteration$in tunnel
$\left(1-\lambda_t\right) \theta_{at,i}+\lambda_t \left(\theta_{at,0}+\Delta \theta_{air}\right)$in trough or channel
$\left(1-\lambda_t\right) \theta_{at,i}+\lambda_t \theta_{at,0}$in air-filled pipe with ducts
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